Heel-seat extension for lasts.



J. A. DOW. HEEL SEAT EXTENSION FOR LASTS. APPLIoATIoN FILED AUG. 15,isos.

976,788. Patented Nov.22, 1910.

v 7g l 7'/ r @iw m //////f//////////////////.,/,/////,A

THE NaRRls PETERS co.. WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

JOSEPH A. DOW, OF LYNN, MASSACHUSETTS, ASSIGNOR T0 RELINDO CUSHION SHOECOMPANY, OF LYNN, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS. i

HEEL-SEAT EXTENSION FOR LASTS.

To all whom it may concern:

Be it known that I, JOSEPH A. Dow, of Lynn, in the county of Essex andState of Massachusetts, have invented certain new and usefulImprovements in Heel-Seat EX- tensions for Lasts, of which the followingis a specification.

This invention relates to a last for making a boot or shoe having aninternal elastic heel cushion located above the rigid portion of theheel of the shoe instead of forming the tread portion of the heel, theheel portion of the innersole of the shoe being olset below the highestpart of the shank portion to form the bottom and front end wall of arecess adapted to contain an elastic cushion, the upper portion or footsupporting surface of which is substantially flush with the highest partof the shank portion of the innersole.

The invention consists in a heel seat eX- tension having an attachmentfor an ordinary last and enabling a shoe having the above-mentionedcushion pocket to be made on the last.

Of the accompanying drawings forming a part of this specilication,Figures 1 and 2 represent plan views of the parts or members of aheel-seat extension embodying my invention. Fig. 3 represents a. sectionon line 3-3 of Fig. 1. Fig. 4 represents a section on line 4 4 of Fig.2. Fig. 5 represents a modification of the part shown in Fig. 4. Fig. 6represents a longitudinal section of the heel portion of a partiallycompleted boot or shoe constructed in accordance with my invention. Fig.7 represents a longitudinal section of the heel portion of the completedboot or shoe. Fig. 8 represents a perspective view of the curb lift.

The same reference characters indicate the same parts in all thefigures.

In the drawings, 12 represents the heel portion of an ordinary lastwhich is or may be provided with the usual metallic bottom plate 18,although the latter is not essential to the purposes of my invention.

Taking an innersole 14, the heel portion of which has a bottom layer 15,which in the completed shoe forms the bottom of a cushion pocket, and atop layer 16 which forms a cover for a cushion inserted in said pocket,said layers being formed either by splitting the heel portion of theinnersole, or otherwise, I interpose between said layers 15 andSpecicaton of Letters Patent. Patented N0V 22, 1910.

Application filed August 15, 1908.

Serial No. 448,637.

16 a curb lift 17, the margin of which is heelshaped, while the cent-eris cut away to form an opening 18, the margin of which constitutes thewall or edge boundary of the cushion pocket. In case the heel portion ofthe innersole is not split, the curb lift is applied above the heelportion of the innersole. The outer side of said lift is beveled at thefront end of the lift to form an incline 19. The beveled portion of thecurb lift 17 is preferably secured to the corresponding portion of theinnersole either by a tack 20, or by sitches or cement. To the curb lift17 I apply temporarily a heel-seat extension, which, in effect,constitutes a part of the last although it is not secured thereto, andis adapted to be applied and removed by the operator. Said extension ispreferably composed of two parts or members, 21 and 22, which are madein separate pieces and are separable from each other. The part 21constitutes a rigid filler for the opening 18 in the curb lift, saidfiller being a metal plate of substantially the same thickness as thecurb lift, and having its margin formed to accurately fit the margin ofthe opening 18. Preferably, the margin of the opening 18 is enlarged toform a seat 24 which is inclined outwardly from an abutment or wallportion 25, the filling portion 21 having a flange 27 conforming to theenlarged portion 24, and a shoulder' 28 conforming to the abutment orwall 25. The part or member 22 of the heel-seat extension is preferablya relatively thin heel-shaped plate of greater area than the liller 21,and formed to bear on the outer side of the latter, and to project overthe outer side of the curb lift, as shown in Fig. 6. The parts 21 and 22are provided with centralorices 29 and 30, through which an attachingnail 31 may be driven to secure the heel portion of the outersole to thelast. The parts 21 and 22 are also provided with longitudinal slots 32which coincide and are adapted to receive fastenings such as tacks 33,the heads of which are wider than the slots, said tacks being driventhrough the slots into the portion 15 of the innersole, as shown in Fig.6. The tacks and slots permit slight edgewise adjustments of the partsof the extension relatively to the innersole. The chief object of thisadjustability of the eX- tension parts is to enable them to be movedforward or backward to compensate for variations in the stretch of thestock and to enable the laster to accurately fit the parts *inaccordance with the stretch.

' InV practice, the heel-seat` portion is; preferably applied in themanner described to the innersole kin the stock-room of Ka shoe factorybefore the lasting operation. Vhen :the "laster applies the innersoleto-the last,

he is enabled by means of the slots 32 to lnake such adjustment of theheel-seat eXtension as maybe desirable in view of the stretch 'of the'upper kand innersole.

The innersole, with the cushion curb and heel-seat extension applied toit as described,

Yistaken by the laster and placed upon the lastand temporarilylsecured'thereto by the nail '31, after which the innersole is conformedto the .cushion curb' and the heel-` Vseat extension by a suitableleveling'or pressing operation which imparts an incline to the portion35 of the innersole between `the Y,rear portion l5 and the shankportionthereof, `therear `portion 15 being offset from the bottom of the'last so that it isfadapted to .subsequently form the bottom of 'thecushion 'pocket 36 shown in Fig. 7 lThe outersole 37, is neXtapplied'and its' heel port-ion is ksecured to the oEset heel 'portion ofthe innersole by lshort nails 38 which are clenched upon the part22 "olfthe heel-seat extension.

The usual leather heel 39 is then applied,the YVheel-attaching nails'llObeing also clenched upon the'part 22 of the heel-'seat extension. Afterlthe heel has been applied, the heelseat extensionis released from theinnersole by the withdrawal Vof the tacks 38, and is Sthen withdrawnfrom the cushion curb, leaving-the. cushion pocket vacant and ready forthe reception of a suitable elastic-'heel cushion shaped to conformaccurately to said pocket. In removing the heel-seat eXten- 'sion,rtheirear portion of the cushion curb is swung outwardly to permit the`withof a clenching part S22-which is of greater f areafthan the'filling part 21. If desired,

however, the heel-seat extension may be made "in a single piece ofthickness equal to the combined thickness of the two parts 21 and 22,asshown vin Fig. 5.

From the foregoing it Willbe seen that my invention is embodied solelyin a heel seat extension for a last adapted to be used as :described toform a cushion-receiving pocket.

I claim:

l. A heel-seat extension for lasts comprisling a filling portion havingan area considerably less than that of the heel seat of a lastwher'ebysaid filling portion may occupy an opening in a cushion-confining lift,and an outer clenching portion, said extension being separable from thelast with which it is used.

2. A heel-seat extension for lasts comprising afilling portion having anarea considerably less than that of the heel seat of a last whereby saidfilling portion may occupy an opening in a cushion-confining lift, andan outer clenching portion, said extension being formed in two partswhich are separa- -ble from each other and from the last with whichtheyare used.

'3. A heel-seat extension for lasts compris- 'ing a filling portionhaving an area considerably less than that of the heel seat of a lastwhereby said filling portion may occupy anopening in a cushion-confininglift, and an outer clenching portion, said extension being separablefrom the last with which it is used, the extension being provided withfastener-engaging means which permit `adjustment of the extensionrelatively to the last and parts of the boot or shoe thereon.

n 4. A heel-seat extension for lasts comprising a filling portion havingan area considerably less than that of the heel `seat of a -lastwherebysaid-filling portion may occupy an opening in a cushion-confining lift,and an outer clenching portion, said extension being formed in two`parts which are separable from each other and from the last with whichthey are used, said parts being provided with coinciding longitudinalslots, adapted t-o receive fastening devices.

5. A heel-seat extension for lasts, separable from the last-with whichit is used, said extension having an area considerably less than that ofthe heel-seat of such last, theentire margin of saidextension having anoutwardly extending flange, substanti ally as and for the purpose setforth.

In testimony whereof I have aiixed my signature, inv presence of twowitnesses.

JOSEPH A. DOI/V. Witnesses:

GILBERT C. BEMIs, ARTHUR H. BROWN.

